function [model ret] = fisher_2(classA1, classA2)

X = vertcat(classA1,classA2);
y (1:length(classA1)) = 1;
y (end+1: end+length(classA2)) = 2;

s = size(X);
ret = struct('X', X', 'y', y, 'dim', s(2), 'num_dat', length(y));
model = fld(ret);

end
 